Credit-Wallet + Ledger + Tier-Preisableitung (Fundament)
Echte Credit-Wallet (1 Credit = 1 EUR) mit append-only Ledger als Basis fuer die Credit-Oekonomie aus dem Decision-Update (Rev. 4): - credit_wallets (denormalisierter Saldo) + credit_transactions (Ledger, vorzeichenbehaftet, balance_after, polymorphe reference) - CreditWalletService: einziger Schreibpfad, atomar mit Row-Lock, InsufficientCreditsException mit shortfall fuer den Mini-Checkout - Tier-Enum (Einzel/Starter/Business/Pro/Agency) + User::currentTier() - CreditPricingService: tier-gestaffelte Ableitung aus config/credits.php (Extra-PM 19/15/12/10/8, Boost 12/20/35, PDF 3, Depublish 25, Pruef-Quota) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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app/Models/CreditWallet.php
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app/Models/CreditWallet.php
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<?php
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namespace App\Models;
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use App\Services\Billing\CreditWalletService;
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use Database\Factories\CreditWalletFactory;
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use Illuminate\Database\Eloquent\Factories\HasFactory;
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use Illuminate\Database\Eloquent\Model;
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use Illuminate\Database\Eloquent\Relations\BelongsTo;
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use Illuminate\Database\Eloquent\Relations\HasMany;
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/**
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* Credit-Guthaben eines Users. `balance_credits` ist der denormalisierte
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* Saldo (1 Credit = 1 €); die maßgebliche Wahrheit ist der Ledger in
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* `transactions`. Schreibzugriffe laufen ausschließlich über
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* {@see CreditWalletService} (atomar + gesperrt).
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*/
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class CreditWallet extends Model
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{
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/** @use HasFactory<CreditWalletFactory> */
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use HasFactory;
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protected $fillable = [
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'user_id',
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'balance_credits',
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];
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protected function casts(): array
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{
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return [
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'balance_credits' => 'integer',
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];
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}
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public function user(): BelongsTo
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{
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return $this->belongsTo(User::class);
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}
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public function transactions(): HasMany
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{
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return $this->hasMany(CreditTransaction::class)->orderByDesc('created_at');
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}
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}
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